political correspondent paul steinhauser joins us from his home base in washington. yesterday you were in pennsylvania covering a paul ryan rally. what do you think is the message for the challengers? >> we're hearing change. change and change. remember four years ago president obama ran on the mantle of hope and change. romney finished up at a rally out in colorado. another one of those eight battleground states we keep talking about. and what mitt romney is saying do you want another four years of under president obama or do you want something a little different? here's part of what he said. >> change can't be measured in speeches. it is measured in achievements. and four years ago, four years ago candidate obama promise dodd so very much, but he's fallen so very short. you recall. he promised he'd be a post-partisan president but he's been most partisan. dividing, attacking, blaming. >> you know, at this late hour here it's all about the ground game. it's about the candidates making sure their supporters actually vote. randi, we heard from both campaigns. the obam